Ravikant talked about the currency of Silicon Valley, which he says is deals shared, talent referred, and acquirers introduced. He explains that AngelList, a service he co-founded that matches early-stage startups with investors, puts these transactions online. We also chatted about his secret to picking the right startups for angel investments (Ravikant invested in Twitter, Foursquare, BranchOut, Codecademy, Uber, Heyzap and Disqus).